Cannot multiple inherit from two classes that both define __slots__

src/causalprog/_abc/backend_agnostic.py

@@ -17,7 +17,6 @@ class BackendAgnostic(ABC, Generic[Backend]):
     calls to the ``_backend_obj`` as necessary.
     """
 
-    __slots__ = ("_backend_obj",)
     _backend_obj: Backend
 
     def __getattr__(self, name: str) -> Any:  # noqa: ANN401

src/causalprog/_abc/labelled.py

@@ -11,7 +11,6 @@ class Labelled(ABC):
     ``label`` property of the class.
     """
 
-    __slots__ = ("_label",)
     _label: str
 
     @property